Deep beneath the hillsides and suburbs of Brazil, there are tunnels so vast and regular that they look like abandoned subway ...

Indigenous Australians may have been fossil collectors, not hunters that drove megafauna to extinction, new research suggests. For more than 40 years, cuts in the lower leg bone of a now-extinct giant ...

Huge tunnels under southern Brazil and northern Argentina were potentially made by giant, Ice Age sloths for refuge and rest ...